xz= xy But what happens when x=0 are we allowed to cancel? : DS Archive
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 23 Jan 2017, 15:37

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# xz= xy But what happens when x=0 are we allowed to cancel?

Author Message
Eternal Intern
Joined: 07 Jun 2003
Posts: 467
Location: Lone Star State
Followers: 1

Kudos [?]: 144 [0], given: 0

xz= xy But what happens when x=0 are we allowed to cancel? [#permalink]

### Show Tags

30 Jul 2003, 16:07
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

xz= xy

But what happens when x=0 are we allowed to cancel?

This might arise on test day.

VT
_________________

Ride em cowboy

GMAT Instructor
Joined: 07 Jul 2003
Posts: 770
Location: New York NY 10024
Schools: Haas, MFE; Anderson, MBA; USC, MSEE
Followers: 25

Kudos [?]: 205 [0], given: 0

Re: DS: Can we cancel here? [#permalink]

### Show Tags

30 Jul 2003, 17:18
Curly05 wrote:
xz= xy

But what happens when x=0 are we allowed to cancel?

This might arise on test day.

VT

You cannot divide by zero. Hence if x = 0, you cannot cancel.
_________________

Best,

AkamaiBrah
Former Senior Instructor, Manhattan GMAT and VeritasPrep
Vice President, Midtown NYC Investment Bank, Structured Finance IT
MFE, Haas School of Business, UC Berkeley, Class of 2005
MBA, Anderson School of Management, UCLA, Class of 1993

Manager
Joined: 24 Jun 2003
Posts: 146
Location: India
Followers: 2

Kudos [?]: 2 [0], given: 0

Re: DS: Can we cancel here? [#permalink]

### Show Tags

31 Jul 2003, 04:19
Curly05 wrote:
xz= xy

But what happens when x=0 are we allowed to cancel?

This might arise on test day.

VT

Curly, look at it this way:

xz = xy implies xz-xy=0

or x*(z-y) = 0 which means that either x=0 or z-y=0

Therefore, z=y is the unique solution only for non-zero values of x. Therefore, you cannot simply cancel x on both sides in your equation
Re: DS: Can we cancel here?   [#permalink] 31 Jul 2003, 04:19
Display posts from previous: Sort by